Download Home Chapter 2 Review Worksheet Fill in the best word or phrase. 1.

Name ________________________________
Home Chapter 2 Review Worksheet
Fill in the best word or phrase.
1. ____________________ type of circuit that has only one path for electrons
2. ____________________ negatively charged particle
3. ____________________ type of circuit that has multiple paths for electrons
4. ____________________ material from which light bulb filaments are made
5. ____________________ work divided by time or voltage times current
6. ____________________ controls the flow of electrons in a circuit, turning it on and off
7. ____________________ measure of the opposition to the flow of electrons in a circuit
8. ____________________ the most efficient way to heat water, based on our experiment in Activity 7
9. ____________________ stored energy
10. ____________________ type of energy that involves the movement of electrons
11. ____________________ energy of motion
12. ____________________ closed path where electrons flow
13. ____________________ a material in which it is difficult for electrons to move
14. ____________________ the energy required to raise the temperature of 1 kg of a material by 1° C.
15. ____________________positively-charged particle
16. ____________________ measure of the flow of electrons in a circuit
17. ____________________ makes work possible
18. ____________________ trips if the current in a household electrical circuit is too high
19. ____________________ this uses the most electricity in the home, after the heater and air conditioner
20. ____________________ using a force to move an object
21. ____________________ measure of the “push” electrons get in a circuit, the work per unit charge
22. ____________________ a material that allows electrons to move easily
23. ____________________ person who named the two types of charges positive and negative
24. ____________________ the two most common ratings for fuses and circuit breakers in the home
25. ____________________ range of values for cost of electricity in the US, in $/kWh
Other questions
1. List as many forms of energy as you can.
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2. Draw a diagram showing the changes in energy as a portable CD player plays a CD.
3. Electricity is caused by the interaction of positively-charged ____________________ and negativelycharged ____________________. Like charges ____________________. and opposite charges
____________________.
4. What is the law of conservation of energy? Explain how it applies when a generator is used to produce
electrical energy.
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5. Draw a series circuit, showing the generator, the wires and three light bulbs. Do the same for a parallel
circuit.
6. What happens when a single bulb is removed from a series circuit that has four bulbs? From a parallel
circuit that has four bulbs?
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7. Identical materials, a six volt battery and three light bulbs, are used to make series and parallel circuits.
In each circuit, will all bulbs have equal brightness? In which circuit, the series or the parallel, will the
bulbs shine more brightly?
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8. Voltage is measured in ____________________, current in ___________________, resistance in
____________________ and charge in ____________________. Energy is measured
in____________________ and power in ____________________. The special unit used for household
electrical energy use is the ____________________.
(Include the symbol for each unit as well as the name.)
9. One watt•second is equal to one ____________________. One joule per coulomb is equal to one
____________________.
10. What type of circuit is used in household wiring. Why?
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11. Which lights will be controlled by each of the switches in this circuit? When you consider a particular
switch, assume that all of the other switches are in the “on” position.
5
A
2
B
C
4
3
1
Switch
Controls bulbs
1
___________
2
___________
3
___________
4
___________
5
___________
12. What is the cost per kWh of electrical energy for each of the electric bills on p. 75 of your text book?
Show your work.
13. Fill in the missing numbers in this table. Assume a cost for electricity of $0.11/kWh.
Appliance
Refrigerator
Voltage
(V)
120
Clothes Dryer 240
Current
(A)
16
Power
(W)
9.6
Power
(kW)
Time used /
month (hrs)
75
Cost
($)
30
Toaster
120
600
10
Hair dryer
120
1650
6
14. A 250-watt immersion heater is operated for 12 minutes in a beaker filled with 0.75 L of water. The
water temperature rises from 20°C to 62°C.
(a) What is the energy supplied by the immersion heater, in Joules?
(b) What is the heat energy added to the water?
(c) What is the efficiency of the heater?
15. Describe an experiment in which you determine which of three toasters is the most efficient.
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